ghostscript-native:fix disable-system-libtiff

Modify configure to add the check to make sure
ghostscrip could work while system-libtiff is
disabled.

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Upstream-Status: Pending
---
 configure.ac | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -1055,6 +1055,7 @@ Disabling tiff output devices.])
 esac
 
 if test $SHARE_LIBTIFF -eq 0; then
+    if test -e $LIBTIFFDIR/configure; then
       echo
       echo "Running libtiff configure script..."
       olddir=`pwd`
@@ -1069,6 +1070,10 @@ if test $SHARE_LIBTIFF -eq 0; then
       cd "$olddir"
       echo
       echo "Continuing with Ghostscript configuration..."
+    else
+      AC_MSG_NOTICE([Could not find local copy of libtiff.
+Disabling tiff output devices.])
+    fi
 fi
 
 AC_SUBST(SHARE_LIBTIFF)
-- 
1.8.1.2